Middlesex



(No Mode 'l.) 2 Sheets-Sheet 1.

J, MILLAR.

TIME CHECK. N0. 354,921 Patented Dec. 28, 1886.

NA Pawns, PhomLithogmphen Washington, 0 c.

(No Model.) 2 Sheets-$heet 2. J. MILLAR.

TIME CHECK. No. 354,921. Patented Dec. 28, 1886.

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UNITED STATES PATENT OFFICE.

JOHN MILLAR, OF BETHNALL HOUSE, CAMBRIDGE ROAD, COUNTY OF MIDDLESEX, ENGLAND.

TIME-CHECK.

tZPECIFICATION forming part of Letters Patent No. 35%,921, dated December 28, 1886,

Application filed February l0, 1886. Serial No.19l,454.

To all whom it may concern.-

Be it known that 1, JOHN MILLAR, a subject ofthe Queen ofGreat Britain, residing at Bethnall House, Cambridge Road, in the county of Middlesex, England, physician, have invented certain new and useful Improvements in Tell- Tale Time-Keepers, of which the following is a specification.

My invention relates to improvements in a tell tale tinie keeper of the class in which a clockof suitable construction is provided with a paper disk suitably marked replacing the hands and revolving, say, in twelve hours.

This clock is locked up in a box, and there is a hole in the door or cover of the box through which. a pencil can be inserted and made to mark on the paper disk. The clock so locked up is fixed at the station to be visited by the watchman.

.To prevent or detect tampering with the apparatus by opening the box with a false key, and then marking the disk in a manner to deceive, there is provided a sheet of transferpaper beneath the disk, but separated from it by an intermediate surface of card-board or other material with an aperture in it. The aperture coincides with the hole in the door or cover of the case. The transfer-paper and the separating material are so fixed in the clock as not to revolve with the disk. \Vhen the disk is marked in a legitimate way in addition to the mark on the face, a corresponding mark is produced on the back by the transfenpaper.

In accordance Willi myimprovements in tclltale time-keepers of the above outlined type, the position of the clock in the box can be altered to render the necessary changes of the paper disk less frequent, and to defeat any attempt to remove and replace the paper disk I employ a circular nut of large diameter to con: fine the disk upon the hour-axis of the clock. I formasmallperforation in this nut, and when the paper disk is in place I mark it with a pin inserted through this perforation. Similarly before changing thcdiskIagaininsertthepoiut of a pin into the perforation, which, ifthe disk has been tampered with, marks it a second time, but if not passes through. the original perforation.

In order that my said invention may be fully understood and readily carried into effect, I

(No model.)

annexed.

' In the drawings, Figure l is a front elevation ofthe telltale clock, the door of the case being open. Fig. 2 shows the record-disk separately. Fig. 8 shows'the surface of card-board or other material behind the paper disk. Fig. 4 shows the transfer-disk. Fig. 5 shows ametallic table or surface supporting the preceding parts and serving toinclose the clock-train. Fig. 6 shows a portion of the hour-axis of the clock. Fig. 7 is a view, partlyin vertical section and partly in elevation, of the timekeeper.

a a is the case. lt has a door, and it is provided with a lock. At a is the hole in the door, by which, when the case is closed, the pencil is inserted for the purpose of marking the record-disk.

Z) is the record-disk. It is of paper. The hole in the center of the record-disk, through which the hour-axis of the clock-train passes, is made to receive the axis loosely, so as to increase the difficulty of tampering with the nut and record-disk and readjusting them after movement to their previous position.

c is the hour-axis of the clock. lar, 0, upon it, and is screwed to receive a large flat nut, d. The record-disk b, when in place, is clipped between the collar 0 and the nut d.

d is the perforation in the nut d for the insertion of a pinpoint to mark the record-disk, so that when set it may, not be removed and re placed without detection.

6 is the surface interposed between the recorddisk and the transfer-disk. f is the transfer-disk. back of the recorddisk when the pencil is legitimately applied to the facethat is to say, through the hole cand then the point of the pencil meets the gap 0 in the surface 6. The interior vertical dimension of the case exceeds the height of the clock in order that the clock may be verticallyadjusted and supported at different levels.

g g are shallow blocks, which may be placed in the case beneath the clock to raise it when the recorddisk has been already marked, so that the reeord-disk may serve for more than one record, and that marks afterward made may not interfere or be confused with previous marks.

It only marks the It has a col- The blocks 9 gflwhen not in use, rest above the clock, as shown. Colored pencils may also be employed to distinguish the records, so that more than one record may be made on the same part of the recorddisk with out confusion.

By employing pencils of three colors to mark the outer ring of the record-disk and raising the clock by the successive use of first one and then both of the blocks gand g and marking the inner rings with pencils of two colors, it will be necessary to change the record-disks only once a week.

Having 110w particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is The combination of the case (1, having the JOHN MILLAR.

Witnesses:

THOMAS LAKE, JNo. DEAN,

B0t710f17 Gracechzu'chStrccf, London. 

